20400220244642 has 16 divisors (see below), whose sum is σ = 35019910423680. Its totient is φ = 8730925460928.

The previous prime is 20400220244627. The next prime is 20400220244653. The reversal of 20400220244642 is 24644202200402.

It is a junction number, because it is equal to n+sod(n) for n = 20400220244599 and 20400220244608.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1002162167 + ... + 1002182522.

It is an arithmetic number, because the mean of its divisors is an integer number (2188744401480).

Almost surely, 2^{20400220244642} is an apocalyptic number.

20400220244642 is a deficient number, since it is larger than the sum of its proper divisors (14619690179038).

20400220244642 is a wasteful number, since it uses less digits than its factorization.

20400220244642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2004345425.

The product of its (nonzero) digits is 49152, while the sum is 32.

The spelling of 20400220244642 in words is "twenty trillion, four hundred billion, two hundred twenty million, two hundred forty-four thousand, six hundred forty-two".